RxJS Kya Hai? | Reactive Programming Ki Shuruaat!

Aaj hum baat karenge RxJS ke baare mein, jo ek powerful library hai reactive programming ke liye. Agar aap Angular developer hain ya asynchronous programming mein interest rakhte hain, to RxJS aapke kaam ka tool hai. Chaliye samajhte hain ki RxJS kya hai, kaise kaam karta hai, aur iska use kahan hota hai.
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RxJS ka full form hai Reactive Extensions for JavaScript.
Yeh ek JavaScript library hai jo asynchronous aur event-based programming ke liye kaam aati hai. Iska core concept hai Observables, jo asynchronous data streams ko handle karne mein madad karte hain.

Simple terms mein, RxJS aapko asynchronous operations (like HTTP requests, user interactions, etc.) ko easily manage karne aur process karne ke tools deta hai.

RxJS Ke Core Concepts
1. Observable:
Observable ek data stream ko represent karta hai jo asynchronously emit hoti hai.
Example: Ek button click events ka stream.

2. Observer:
Observer wo hota hai jo observable se emitted data ko listen karta hai aur uspe react karta hai.

3. Subscription:
Ek process jisme observer observable ke saath connect hota hai.
Example: HTTP request se data fetch karna.

4. Operators:
RxJS mein operators aapko data streams ko manipulate karne ke liye powerful tools dete hain. Jaise:
- `map()`: Data ko transform karta hai.
- `filter()`: Specific conditions ke according data ko filter karta hai.

5. Subjects:
Subject ek special type ka observable hota hai jo data emit bhi kar sakta hai aur listen bhi kar sakta hai.

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